I have a suggestion for GM......To extend battery life, take out the AC, Heater, radio, On Star ( although it may come in handy with this vehicle), navigation, headlites and blinkers......I'd suggest reflective tape so other drivers may see the Volt as they approach. In the passenger floorboard, may I be so bold to suggest a set of pedals, hooked to the batteries( as an addon, suggested cost 1699.00) to extend battery life. For the higher end buyer, how bout a mini windmill attached to the roof, creating its own energy source. With this energy saving option, the Volt could possibly qualify for two tax credits.
Oh, and lets not forget obamas favorite energy saving idea....keep those tires inflated to thier proper air pressure.